The LKKTOP Latest mode bluetooth wireless speaker handheld microphone is your best choice. Why choose LKKTOP Bluetooth handheld microphone? --Make your life more colourful and music. --Portable Karaoke Microphones --The most convenient Party Supplies, whatever home party, travel and camping, perfect to show your voice. All our Karaokes are Official Authentic --Products with High Quality. --Remarkably KTV Echo Effect—it produces a more stunning KTV live-sound and more clear music rhythm with echo reverberation . --MultiProtect Safety Battery—Our MultiProtect Safety Battery could keep you and your devices Output power: 27mW (headphone output), 9WX3 (speaker output) Frequency range: 100Hz~10K Hz Maximum sound pressure level: >115dB 1KHz THD